“In the light of accumulated evidence it appears that recent trends in sailing yacht design (largely encouraged by the International Offshore Rule, IOR) must take some blame for the increased rate of casualties among contemporary yachts. Sailing people have an uncomfortable feeling that the IOR type of ocean-going yacht aggressively invading the whole boat building industry, is unfit for seagoing.
Admittedly, sensible and prudent cruising owners have been alerted to the IOR fashion. But many boat owners cannot properly distinguish an honest, sturdy and long-lasting cruising boat from a flimsy, unseaworthy and short-lived racer. Are IOR boats designed with singlemindedness of purpose really fit for offshore racing? Fitness of sailing craft is measured by their behavior and ultimate effects – their statistical propensity to survive. This appears to be lamentable.”
A. Marchaj–Seaworthiness: The Forgotten Factor (1986)
(Marchaj was a Polish-born yachtsman and professor who published a large number of scientific studies into the aerodynamics and hydrodynamics of sailing boats. He settled in the UK in 1970. His warnings about seaworthiness came a decade before the tragic 1979 Fastnet Race. Marchaj died in 2015, aged 97.)